fix: use xsct (not Vivado) for JTAG check + normalize COM>=10 ports on Windows

**JTAG check**: Switch from Vivado to xsct
- xsct is already proven to work (JTAG reboot succeeds)
- Much lighter than Vivado (no GUI infrastructure / open_hw_manager)
- Uses -eval inline TCL: connect; targets; disconnect; quit
- Removes dead tempfile/Path/os imports

**Windows COM port**: Add normalize_port() to serial_monitor.py
- COM ports >= 10 require NT namespace prefix (\.\COM11)
- Without it: PermissionError(13, '拒绝访问。')
- Applied at all 7 call sites: serial_monitor (5), reboot_manager, widgets

src/gui/widgets.py

@@ -1075,7 +1075,8 @@ class UartMonitorWindow(ctk.CTkToplevel):
         def _bg_open() -> None:
             try:
                 import serial
-                ser = serial.Serial(self._port, self._baudrate, timeout=1)
+                from serial_monitor import normalize_port
+                ser = serial.Serial(normalize_port(self._port), self._baudrate, timeout=1)
                 ser.close()
                 self.after(0, self._on_open_success)
             except Exception as e:

src/reboot_manager.py

@@ -125,9 +125,10 @@ def reboot_via_serial(
 
     try:
         import serial
+        from serial_monitor import normalize_port
 
         with serial.Serial(
-            config.serial_port,
+            normalize_port(config.serial_port),
             config.serial_baudrate,
             timeout=5,
         ) as ser:

src/serial_monitor.py

@@ -7,8 +7,10 @@ Provides UartMonitor for continuous background monitoring.
 
 from __future__ import annotations
 
+import platform
 import re
 import threading
+import time
 from dataclasses import dataclass
 from typing import Callable
 
@@ -16,6 +18,26 @@ import serial
 import serial.tools.list_ports
 
 
+def normalize_port(port: str) -> str:
+    """Normalize a serial port name for the current platform.
+
+    On Windows, COM ports numbered >= 10 require the NT namespace
+    prefix (\\\\.\\COM11). Without it, CreateFile fails with
+    'Access denied' or 'file not found'.
+
+    Args:
+        port: Raw port name from config or detection.
+
+    Returns:
+        Normalized port name suitable for serial.Serial().
+    """
+    if platform.system() == "Windows":
+        match = re.match(r"^COM(\d+)$", port, re.IGNORECASE)
+        if match and int(match.group(1)) >= 10:
+            return rf"\\.\{port}"
+    return port
+
+
 @dataclass
 class BootInfo:
     """Parsed information extracted from Zynq boot output."""
@@ -168,7 +190,7 @@ def check_uart_available(
 
     # 3. Try to open and read
     try:
-        with serial.Serial(port, baudrate, timeout=timeout) as ser:
+        with serial.Serial(normalize_port(port), baudrate, timeout=timeout) as ser:
             ser.reset_input_buffer()
             lines: list[str] = []
             while ser.in_waiting:
@@ -206,7 +228,7 @@ def read_serial_stream(
         serial.SerialException: If the port cannot be opened.
     """
     lines: list[str] = []
-    with serial.Serial(port, baudrate, timeout=timeout) as ser:
+    with serial.Serial(normalize_port(port), baudrate, timeout=timeout) as ser:
         # Clear any pending data
         ser.reset_input_buffer()
         while ser.in_waiting:
@@ -242,8 +264,7 @@ def test_serial_version(
     import serial
 
     try:
-        with serial.Serial(port, baudrate, timeout=timeout) as ser:
-            # Clear buffers
+        with serial.Serial(normalize_port(port), baudrate, timeout=timeout) as ser:
             ser.reset_input_buffer()
             ser.reset_output_buffer()
 
@@ -384,7 +405,7 @@ class UartMonitor:
 
         # Quick port check before starting thread
         try:
-            test_ser = serial.Serial(self._port, self._baudrate, timeout=1)
+            test_ser = serial.Serial(normalize_port(self._port), self._baudrate, timeout=1)
             test_ser.close()
         except serial.SerialException as e:
             if self.on_error:
@@ -411,7 +432,7 @@ class UartMonitor:
         """Main read loop running in background thread."""
         try:
             ser = serial.Serial(
-                self._port,
+                normalize_port(self._port),
                 self._baudrate,
                 timeout=self._timeout,
             )

src/zynq_checker.py

@@ -8,17 +8,14 @@ recognition on the JTAG chain.
 
 from __future__ import annotations
 
-import os
 import re
 import subprocess
-import tempfile
 import time
 from dataclasses import dataclass, field
-from pathlib import Path
 from typing import Callable
 
 from config_manager import Config
-from vitis_checker import get_vivado_path, get_hw_server_path, build_tool_command
+from vitis_checker import get_xsct_path, get_hw_server_path, build_tool_command
 
 
 @dataclass
@@ -102,35 +99,32 @@ def check_zynq_jtag(config: Config, callback: Callable | None = None) -> ZynqChe
 
     hw_proc: subprocess.Popen | None = None
     try:
-        # Start hw_server in the background (it daemonises own I/O)
+        # Start hw_server in the background (needed for xsct connect)
         hw_proc = subprocess.Popen(
             build_tool_command(hw_server_path),
             stdout=subprocess.DEVNULL,
             stderr=subprocess.DEVNULL,
         )
-        # Give hw_server a moment to bind its port
-        time.sleep(2)
+        time.sleep(2)  # let hw_server bind its port
 
-        # ── 2. Find vivado ────────────────────────────────────
-        vivado_path = get_vivado_path(xilinx_root=xilinx_root)
-        if not vivado_path:
+        # ── 2. Find xsct (much lighter than Vivado for JTAG ops) ──
+        xsct_path = get_xsct_path(xilinx_root=xilinx_root)
+        if not xsct_path:
             return ZynqCheckResult(
                 devices=[], jtag_chain=[], is_present=False,
                 ps_detected=False, pl_detected=False,
                 hw_server_url=hw_server_url,
-                error="Vivado not found",
+                error="xsct not found",
             )
 
-        # ── 3. Create and run JTAG query TCL ──────────────────
+        # ── 3. Run JTAG query TCL via xsct ────────────────────
         tcl_content = _build_jtag_query_tcl()
-        tcl_path = Path(tempfile.gettempdir()) / f"zynq_jtag_check_{os.getpid()}.tcl"
-        tcl_path.write_text(tcl_content)
 
         if callback:
             callback("progress", "Scanning JTAG chain...")
 
         cmd = build_tool_command(
-            vivado_path, "-mode", "batch", "-source", str(tcl_path),
+            xsct_path, "-eval", tcl_content,
         )
         python_timeout = config.step_timeouts.get("check_env", 120)
         result = subprocess.run(
@@ -139,7 +133,6 @@ def check_zynq_jtag(config: Config, callback: Callable | None = None) -> ZynqChe
             text=True,
             timeout=python_timeout,
         )
-        tcl_path.unlink(missing_ok=True)
 
         output = result.stdout + result.stderr
         jtag_chain = _parse_jtag_chain(output)
@@ -193,23 +186,25 @@ def check_zynq_jtag(config: Config, callback: Callable | None = None) -> ZynqChe
 
 
 def _build_jtag_query_tcl() -> str:
-    """Build TCL script for JTAG device query.
+    """Build TCL script for xsct JTAG device query.
+
+    Uses xsct (not Vivado) because:
+    - xsct is much lighter (no GUI infrastructure)
+    - xsct JTAG reboot already works on this system
+    - connect + targets lists all devices on the JTAG chain
 
     Returns:
-        TCL script content as string.
+        TCL script content as string (semicolon-delimited for -eval mode).
     """
-    return """
-open_hw_manager
-connect_hw_server
-open_hw_target
-puts "===JTAG_START==="
-foreach dev [get_hw_devices] {
-  set name [get_property NAME $dev]
-  puts "DEVICE:$name"
-}
-puts "===JTAG_END==="
-quit
-"""
+    return (
+        "connect; "
+        'puts "===JTAG_START==="; '
+        "set all [targets]; "
+        'foreach t $all { puts "DEVICE:$t" }; '
+        'puts "===JTAG_END==="; '
+        "disconnect; "
+        "quit"
+    )
 
 
 def _parse_jtag_chain(output: str) -> list[JtagDevice]: